Complicated cable stuff

I'm looking for advice on how to record my Xbox 360 gameplay. I have an ezcap116 which has an RCA (red, white and yellow) and 4-pin S-video input. I will be playing on my monitor on HD, which has a DVI and VGA input. I have separate speakers which have an RCA audio input (red and white) which my sound comes through.

How would I get a HD signal to my monitor that has a DVI or VGA plug with two RCA audio plugs, and a standard composite RCA signal to my ezcap? Thanks in advance!